Smoke-consuming apparatus for furnaces.



PATENTED APR. '7, 1903.

J. R ZARUBA. SMOKE GONSUMING APPARATUS FOR FURNACES.

APPLICATION FILED JULY 10. 1901 no MODEL.

8 BHEETBSHEET 1.

PATENTBD APR. 7, 1903.

J. P; ZARUBA. SMOKE GONSUMING APPARATUS FOR FURNACES.

APPLIGATION FILED JULY 10, 1901.

1") MODEL.

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No. 724,647. A A PATB-NTED APR. 7, 190a.

- J.F.ZARUBA. SMOKE GONSUMING APPARATUS FOR FURNACES.

APPLICATION FILED JULY UL 1901.

N0 MODEL. 3 SHEBTSSHEET 3.

we NORRIS FEYERS co. moruumo WASHINGTON n. I

UNITED STATES PATENT OFFICE.

JOSEF FRANZ ZARUBA, on HAMBURG, GERMANY.

SMOKE-CONSUMING APPARATUS FOR FURNACES.

SPECIFICATION forming part of Letters Patent No. 724,647, dated April 7, 1903.

Application filed July 10,1901.

or more hollow fire 0r grate bars. The airis sucked by steam which is taken from the boiler and passes through the fire-bridge and thence out through forward openings of the same, so as to be blown into the fire in a direction opposite to that of the draft. The steam sucks in the air through .the hollow grate-bars,.which becomes highly heated and is borne along by the steam, which is under boiler-pressure. Means are also provided for saturating the steam with a liquid fuel which is forced into the steam-feed pipe by a pump.

The drawings illustrate the invention as applied to a flame-tube boiler.

- Figure 1 is a longitudinal vertical section of the boiler on line A B, Fig. 2. Fig. 2 is a horizontal section on line C D, Fig. 1; Fig. 3, an elevation, partlyin section, of the boiler.

Upon a support I) in the flame-tube dis mounted the hollow fire-bridge c, which is hollow from end to end. In the top of this bridge are provided holes (1, and in its front are provided holes e. Into the lower part of the fire-bridge 0 enter the hollow fire-bars f, of which two are shown. These tubes extend from the front 9 of the flame-tube a along the right and left side of the same. The tube it passes from the steam-space of the boiler downwardly into and through theash-pit 't' and thence through the supportb into the firebridge 0. Here it connects with a transverse pipe is, arranged within the fire-bridge and provided with nozzles Z, that project into the front openings 2. To protect the tube -h against the heat, it is surrounded by a fireproof jacket or is itself composed of fireproof material--chamotte, magnesite, Dinas stones, &c. The grate-bars m are carried by the support 5, front plate 72, and cross-bars 0.

The two fire-barsf,which serve as air-tubes, are shown to be of triangular cross-section; but they may obviously be differently shaped. On the side of each fire-bar that extends along 'sion.

Serial No. 67,698. (No model.)

the flame-tube a are provided a number of recesses through which the air may enter laterally into the fire. These air-tubes are similar to the steam-pipe h, inclosed by a tireproof jacket, or are composed of a fireproof material.

. The liquid fuel is introduced into the steam pipe h from a receptacle p by meansof a pump (1, that is driven by a belt or other transmission through steam made in the boiler, the drawings showing a belt transmis- The liquid fuel is conveyed through pipe 1" into a case 3, that is arranged around the steam-pipe h, so that the fuel runs down along such pipe and is taken along by the steam admitted near the lower end of the case. p The steam thus saturated with the liquid fuel is ejected into the fire directly through the openings e of the fire-bridge c. It also sucks in the air, highly heated, within the hollow fire-bridge. The steam forms watergas in large quantities, while it simultaneously, in conjunction with the liquid fuel, saturates the small particles of coal, so as to increase their weight, and thereby retain them. In this way such particles are rekindled and are completely consumed. The air which enters the flame-tube a through the openings e, as well as through the openings (1, serves to materially increase the combustion.

By the above construction a mixture of steam, air, and liquid fuel is supplied to the fire-chamber, which renders the combustion smokeless;

What I claim is- In a steam-boiler furnace, the combination of a steam-pipe with a surrounding communicating casing, a liquid-fuel pipe entering said casing, a transverse pipe having forwardly-projecting nozzles and communicating with the steam-pipe, an inclosing hollow fire-bridge having perforations for receiving said'nozzles, and a pair of hollow fire-bars entering said bridge so that a mixture of hot air, steam andliquid fuel is ejected from the fire-bridge into the fire in a direction 0pposite to that of the furnace draft, substantially as specified.

Signed by me at Hamburg, Germany, this 21st day of June, 1901.

J OSEF FRANZ ZARUBA. Witnesses A. TOTHS, E. H. L. MUMMENHOFF. 

